Funding Sources Funding Sources (Details) - USD ($)	1 Months Ended	3 Months Ended
	Apr. 30, 2016	Mar. 31, 2016	Jun. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Sale Leaseback Transaction, Net Proceeds, Financing Activities		$ 600,000,000
Bridge Loan	$ 2,500,000,000		$ 0.0469
MLS 2nd Tranche [Member]
Financing Receivable, Recorded Investment [Line Items]
Sale Leaseback Transaction, Net Proceeds, Investing Activities	1,100,000,000
Network Sale-Leaseback [Member]
Financing Receivable, Recorded Investment [Line Items]
Sale Leaseback Transaction, Net Proceeds, Financing Activities	2,200,000,000
Revolving Credit Facility [Member] | Unsecured Revolving Credit Facility expires in 2018 [Member]
Financing Receivable, Recorded Investment [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity			$ 3,000,000,000
Accounts Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Bridge Loan	$ 2,000,000,000