Commitments, Contingencies and Other Items - Purchase Commitments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Long-term Purchase Commitment
Total	$ 976
Less than 1 Year	398
2 - 3 Years	434
4 - 5 Years	48
After 5 Years	96
Cost of Access Services
Long-term Purchase Commitment
Total	744
Less than 1 Year	338
2 - 3 Years	388
4 - 5 Years	15
After 5 Years	3
Third Party Maintenance Services
Long-term Purchase Commitment
Total	232
Less than 1 Year	60
2 - 3 Years	46
4 - 5 Years	33
After 5 Years	$ 93