LONG-TERM DEBT AND LEASE OBLIGATIONS (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	May 31, 2013	Dec. 31, 2012
LONG-TERM DEBT AND LEASE OBLIGATIONS
Capital leases and mortgage notes	$ 188		$ 119
Unamortized note discounts and premium	(30)		(116)
Total long-term debt	5,823		5,252
Less current portion	133		94
Long-term debt, net of current portion	5,690		5,158
7 3/8%, due 2013
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	7.375%		7.375%
Carrying amount	0		55
9 7/8%, due 2014
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	9.875%		9.875%
Carrying amount	60		60
9 1/4%, due 2015
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	9.25%		9.25%
Carrying amount	474		474
6 3/4%, due 2020
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	6.75%		6.75%
Carrying amount	300		300
8%, due 2020
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	8.00%		8.00%
Carrying amount	750		750
6 7/8%, due 2031
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	6.875%		6.875%
Carrying amount	430		430
6.25%, due 2018
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	6.25%		6.25%
Carrying amount	1,041		1,041
10%, due 2018
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	10.00%		10.00%
Carrying amount	0		714
8 7/8%, due 2019
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	8.875%		8.875%
Carrying amount	0		925
4 3/4%, due 2020
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	4.75%		4.75%
Carrying amount	500		500
4 1/2%, due 2021
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	4.50%		4.50%
Carrying amount	850		0
4 3/8%, due 2021
LONG-TERM DEBT AND LEASE OBLIGATIONS
Interest rate, stated percentage	4.375%	4.375%	4.375%
Carrying amount	1,050		0
Credit Facility due 2016
LONG-TERM DEBT AND LEASE OBLIGATIONS
Carrying amount	$ 210		$ 0