Accumulated other comprehensive income (Details 3) - CHF (SFr) SFr in Millions	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification adjustments, included in net income
Income tax expense	SFr 523	SFr 1,405	SFr 1,276
Gains/(losses) on cash flow hedges
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	31	(13)	(1)
Cumulative translation adjustments
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	6	0	84
Cumulative translation adjustments \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification adjustments, included in net income
Sale of subsidiaries	0	0	84
of which net releases			84
Unrealized gains/(losses) on securities
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	(1)	(13)	(5)
Actuarial gains/(losses)
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	369	187	294
Actuarial gains/(losses) \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income, before tax	472	243	390
Income tax expense	(103)	(56)	(96)
Net prior service credit/ (cost)
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	(83)	(83)	(95)
Net prior service credit/ (cost) \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income, before tax	(110)	(108)	(120)
Income tax expense	27	25	25
Accumulated other comprehensive income
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	322	78	277
Bank
Reclassification adjustments, included in net income
Income tax expense	439	1,299	1,170
Bank \| Gains/(losses) on cash flow hedges
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	24	(16)	(4)
Bank \| Cumulative translation adjustments
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	6	0	83
Bank \| Cumulative translation adjustments \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification adjustments, included in net income
Sale of subsidiaries	0	0	83
of which net releases			84
Bank \| Unrealized gains/(losses) on securities
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	(1)	0	(5)
Bank \| Actuarial gains/(losses)
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	74	44	58
Bank \| Actuarial gains/(losses) \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income, before tax	98	62	92
Income tax expense	(24)	(18)	(34)
Bank \| Net prior service credit/ (cost)
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	(13)	(6)	0
Bank \| Accumulated other comprehensive income
Reclassification adjustments, included in net income
Reclassification adjustments, included in net income	SFr 90	SFr 22	SFr 132

Reclassification adjustments, included in net income, in connection with the sale of subsidiaries.

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Net releases in connection with the sale of subsidiaries.

+ References

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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-Publisher FASB
-Name Accounting Standards Codification
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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580

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