Note 13 - Revenues Revenues, Customer Contract Assets and Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017		Dec. 31, 2016
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net		$ 32	$ 34	$ 0	[1]
Equity Method Investments		602		440	[2]	$ 337
Revenue, Remaining Performance Obligation, Amount		$ 4,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		5 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Percent		85.00%
Contract with Customer, Liability, Revenue Recognized		$ 29
Deferred Revenue, Current		24	23	23	[1]
Deferred Revenue, Noncurrent		57	59	$ 43	[1]
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract with Customer, Asset, Net	[3],[4]		34
Contract with Customer, Asset, Reclassified to Receivable	[4]	$ 32
Equity Method Investments			3
Deferred Revenue, Current	[4]		0
Deferred Revenue, Noncurrent	[4]		$ 16
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		15 years
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year

[1] Adjusted to include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.

[2] Adjusted to include the historical results of the Predecessors. See Notes 1 and 2 for further discussion.

[3] Included in the $34 million change to contract assets is a $32 million reclass from Receivables for amounts for which we were not allowed to invoice as of January 1, 2018.

[4] These amounts exclude balances associated with equity method investments. We recognized a cumulative adjustment of $3 million as a decrease to Equity Method Investments in our consolidated balance sheets as of January 1, 2018 for the impacts related to our equity method investment in TRG. There were no material impacts to this balance during the year ended December 31, 2018 due to the adoption.