Impairment of Long-Lived Assets (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property	$ 731,000,000	$ 1,465,000,000
Less: unearned income	(363,000,000)	(767,000,000)
Net investment in long-term leases	368,000,000	698,000,000
CapitalLeaseNetInvestmentInDirectFinancingLeasesPrepaymentsReceived	$ 1,200,000,000