| Group [member] | Company [member] | ||
| Statement of cash flows [line items] | |||
| Net cash flows from (used in) operating activities | |||
| Net cash flows from (used in) investing activities | |||
| Net cash flows from (used in) financing activities | |||
| Net increase (decrease) in cash and cash equivalents before effect of exchange rate changes | |||
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||
| Effect of exchange rate changes on cash and cash equivalents | |||
| Net increase (decrease) in cash and cash equivalents | |||
| Cash and cash equivalents at beginning of period | |||
| Cash and cash equivalents at end of period | |||