Shareholders' Equity - Share-based Compensation, Awards, Intrinsic Value (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award Other Than Options [Line Items]
Share-based compensation arrangement by share based payment award equity instrument other than options, non vested intrinsic value	$ 232
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award Other Than Options [Line Items]
Intrinsic value RSUs, PSs	$ 98

Per share weighted average intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant