Equity

12 Months Ended

Dec. 31, 2019

Equity

Equity

Note 16—Equity

Shares held by subsidiaries—One of our subsidiaries holds our shares for future use to satisfy our obligations to deliver shares in connection with awards granted under our incentive plans or other rights to acquire our shares.  At December 31, 2019 and 2018, our subsidiary held 6.1 million and 0.9 million shares, respectively.

Accumulated other comprehensive loss—The changes in accumulated other comprehensive loss, presented net of tax, for our defined benefit pension plans were as follows (in millions):

	Years ended December 31,
	2019		2018
Balance, beginning of period	$	(279)	$	(290)
Other comprehensive income (loss) before reclassifications		(25)		6
Reclassifications to net loss		4		5
Other comprehensive income (loss), net		(21)		11
Effect of adopting accounting standards update		(24)		—
Balance, end of period	$	(324)	$	(279)

Redeemable noncontrolling interest—Until June 11, 2018, we owned a 65 percent interest in Angola Deepwater Drilling Company Ltd. (“ADDCL”), a Cayman Islands company and variable interest entity for which we concluded that we were the primary beneficiary.  Angco Cayman Limited (“Angco Cayman”) owned the remaining a 35 percent interest in ADDCL.  Under the terms of ADDCL’s governing documents, Angco Cayman had the right to require us to purchase its interest in ADDCL for cash, and accordingly, we presented the carrying amount of Angco Cayman’s ownership interest as redeemable noncontrolling interest on our consolidated balance sheets.  We also had the right under ADDCL’s governing documents to require Angco Cayman to sell us its interest, and we exercised that right.  On June 11, 2018, pursuant to a settlement requiring no cash payment, we acquired the interests in ADDCL not previously owned by us, and ADDCL became our wholly owned subsidiary.  In connection with the acquisition, we reclassified the $53 million aggregate carrying amount of the redeemable noncontrolling interest to additional paid-in capital.