Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

Name:	us-gaap_DividendsCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Stockholders' Equity - Additional Information (Detail) $ in Millions		3 Months Ended
	Mar. 19, 2015	Dec. 31, 2015 USD ($)	Oct. 31, 2015 USD ($)
Stockholders Equity Note [Line Items]
Stock Repurchase Program, Authorized Amount			$ 5,000
Stock Repurchase Remaining Authorized Amount		$ 5,800
Dividends, Cash		$ 340
Class A common stock
Stockholders Equity Note [Line Items]
Stock split, conversion ratio	4