Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended			12 Months Ended										12 Months Ended
	Oct. 02, 2013	Apr. 01, 2013	Apr. 01, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Maximum	Dec. 31, 2013 PCBC	Dec. 01, 2012 PCBC	Dec. 31, 2013 PB Capital Commercial Real Estate Division	Jun. 30, 2013 PB Capital Commercial Real Estate Division	Dec. 31, 2013 PB Capital Commercial Real Estate Division Maximum	Dec. 31, 2013 First Bank Association Bank Services	Dec. 31, 2013 Core deposit intangibles PCBC	Dec. 31, 2013 Customer Relationships PCBC	Dec. 31, 2013 Other intangibles assets PCBC
Goodwill and Other Intangible Assets
Goodwill				$ 3,228	$ 2,942	$ 2,457		$ 436	$ 413	$ 238	$ 227		$ 30
Intangible assets												1		29	10	6
Intangible assets amortization period							40 years							10 years	10 years
Goodwill impairment recognized	0	0	0
Total amortization expense				65	81	99
Impairment loss						$ 7