Fair Value Measurements (Details 3) - Nonrecurring Basis $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Properties, plant and equipment, net (held and used)	$ 0
Properties, plant and equipment, net (held for sale)	738
Investments and advances	0
Total Assets at Fair Value	738
Properties, plant and equipment, net (held and used), Before-Tax Loss	0
Properties, plant and equipment, net (held for sale), Before-Tax Loss	74
Investments and advances, Before Tax Loss	0
Total Assets at Fair Value, Before-Tax Loss	74
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Properties, plant and equipment, net (held and used)	0
Properties, plant and equipment, net (held for sale)	0
Investments and advances	0
Total Assets at Fair Value	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Properties, plant and equipment, net (held and used)	0
Properties, plant and equipment, net (held for sale)	738
Investments and advances	0
Total Assets at Fair Value	738
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Properties, plant and equipment, net (held and used)	0
Properties, plant and equipment, net (held for sale)	0
Investments and advances	0
Total Assets at Fair Value	$ 0