Bank Financing and Debt Additional Disclosures (Details) (USD $)	3 Months Ended		9 Months Ended						9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Aug. 31, 2014 Senior Notes Due 2019 A [Member]	Aug. 31, 2014 Senior Notes Due 2024 [Member]	Aug. 31, 2014 Senior Notes Due 2044 [Member]	Sep. 30, 2014 Notes Due 2014 [Member]	Sep. 30, 2014 Notes Due 2014 [Member] Redemption Or Repurchase [Member]	Sep. 30, 2014 Senior Notes Due 2023 [Member]	Sep. 30, 2014 Senior Notes Due 2023 [Member] Tender Offer [Member]	Sep. 30, 2014 Debentures Due 2023 [Member]	Sep. 30, 2014 Debentures Due 2023 [Member] Tender Offer [Member]	Sep. 30, 2014 Senior Debentures Due 2030 [Member]	Sep. 30, 2014 Senior Debentures Due 2030 [Member] Tender Offer [Member]	Sep. 30, 2014 Senior Notes Due 2019 B [Member]	Sep. 30, 2014 Senior Notes Due 2019 B [Member] Redemption Or Repurchase [Member]	Sep. 30, 2014 Senior Notes Due 2019 B [Member] Tender Offer [Member]	Sep. 30, 2014 Senior Notes [Member]	Dec. 31, 2013 Senior Notes [Member]	Sep. 30, 2014 Interest rate swap [Member]
Debt Disclosure [Abstract]
Loss on early extinguishment of debt	$ 352,000,000	$ 0	$ 352,000,000	$ 0
Loss on early extinguishment of debt, net of tax	219,000,000		219,000,000
Derivatives [Line Items]
Notional amount of fixed-to-floating swap agreement																					600,000,000
Debt Instruments [Line Items]
Stated interest rate					2.30%	3.70%	4.90%	8.875%		7.125%		7.875%		7.875%		8.875%
Face value of debt					600,000,000	600,000,000	550,000,000												6,440,000,000	5,840,000,000
Repayments/repurchase of debt			$ 1,152,000,000	$ 0					$ 99,000,000		$ 6,000,000		$ 37,000,000		$ 423,000,000		$ 264,000,000	$ 336,000,000