Significant Financing Transactions (Schedule of Equity Units) (Details) (Capital Unit, Class A, USD $) Share data in Millions, unless otherwise specified	0 Months Ended
	Jul. 01, 2014	Jul. 01, 2014
Debt Instrument [Line Items]
Units Issued	20
Total Net Proceeds	$ 982,000,000
Stock Purchase Contract Annual Rate		4.875%
Stock Purchase Contract Liability		142,800,000
Remarketable Subordinated Notes
Debt Instrument [Line Items]
Total Long-term Debt	$ 1,000,000,000	$ 1,000,000,000
RSN Annual Interest Rate	1.50%	1.50%