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Significant Accounting Policies and New Accounting Pronouncements (Tables)
 6 Months Ended
Jun. 30, 2018
Accounting Policies [Abstract]  
Schedule of Cumulative Effects of Changes to Consolidated Balance Sheet

The cumulative effects of the changes to our consolidated balance sheet as of January 1, 2018, for our adoption of ASC 606 and ASC 610-20 were as follows:

 

Balance Sheet

 

Balance at December 31, 2017

 

 

Adjustments Due to ASC 606

 

 

Adjustments Due to ASC 610-20

 

 

Balance at

January 1, 2018

 

(Millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Liabilities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tax equity financing arrangements - VIEs

 

$

98

 

 

$

—

 

 

$

(98

)

 

$

—

 

Deferred income taxes

 

$

1,452

 

 

$

—

 

 

$

(40

)

 

$

1,412

 

Equity

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Retained earnings

 

$

1,475

 

 

$

—

 

 

$

(2

)

 

$

1,473

 

Non-controlling interests

 

$

19

 

 

$

—

 

 

$

140

 

 

$

159

 

 
Effect of Change in Retrospective Presentation Related to Net Periodic Cost

The effect of the change in retrospective presentation related to the net periodic cost of our defined benefit pension and other postretirement employee benefits plans on our consolidated statement of income was as follows:

 

 

 

 

Three Months Ended June 30, 2017

 

 

Six Months Ended June 30, 2017

 

Statement of Income

 

As Revised

 

 

As Previously Reported

 

 

Effect of Change Higher/(Lower)

 

 

As Revised

 

 

As Previously Reported

 

 

Effect of Change Higher/(Lower)

 

(Millions)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operations and maintenance

 

$

493

 

 

$

522

 

 

$

(29

)

 

$

1,015

 

 

$

1,073

 

 

$

(58

)

Other income / (expense)

 

$

(21

)

 

$

8

 

 

$

(29

)

 

$

(37

)

 

$

21

 

 

$

(58

)