Summary of Significant Accounting Policies (Basic and Diluted EPS Calculation for Continuing Operations) (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net income from continuing operations	$ 1,379	$ 1,204	$ 982
Less: Net income attributable to non-controlling interests	28	25	22
Net income attributable to the Company	$ 1,351	$ 1,179	$ 960
Basic weighted average common shares outstanding (in shares)	549,000,000	544,000,000	542,000,000
Dilutive effect of potentially issuable common shares (in shares)	9,000,000	8,000,000	9,000,000
Dilutive weighted average common shares outstanding (in shares)	558,000,000	552,000,000	551,000,000
Average stock price used to calculate common stock equivalents (in dollars per share)	$ 40.97	$ 33.10	$ 29.40
Stock options outstanding (in shares)	22,567,866	32,045,793	38,900,000