Fair Value Measurements (Details 1) - Jun. 30, 2015 - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Millions	Total	Total
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held and used)	$ 2,069	$ 2,069
Properties, plant and equipment, net (held for sale)	289	289
Investments and advances	75	75
Total Assets at Fair Value	2,433	2,433
Properties, plant and equipment, net (held and used) Before-Tax Loss	2,307	2,566
Properties, plant and equipment, net (held for sale) Before-Tax Loss	273	273
Investments and advances Before Tax Loss	20	21
Total Assets at Fair Value Before-Tax Loss	2,600	2,860
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held and used)	0	0
Properties, plant and equipment, net (held for sale)	0	0
Investments and advances	0	0
Total Assets at Fair Value	0	0
Level 2 [Member]
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held and used)	44	44
Properties, plant and equipment, net (held for sale)	289	289
Investments and advances	75	75
Total Assets at Fair Value	408	408
Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis
Properties, plant and equipment, net (held and used)	2,025	2,025
Properties, plant and equipment, net (held for sale)	0	0
Investments and advances	0	0
Total Assets at Fair Value	$ 2,025	$ 2,025