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Shareholders Equity (Notes) | 6 Months Ended
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Jun. 30, 2019
Shareholders' Equity [Abstract] |
Shareholders' Equity and Share-based Payments [Text Block] | Shareholders' Equity Activity in our various shareholders' equity accounts for the six-month periods ended June 30, 2019 and 2018 were as follows (in millions):
| Shares |  | Par Value |  | Additional Paid-in Capital |  | Retained Earnings |  | AOCI |  | Treasury Shares |  | Non-controlling Interest
BALANCE, December 31, 2018 | 115.2 |  |  | $ | 46.2 |  |  | $ | 7,225.0 |  |  | $ | 874.2 |  |  | $ | 18.2 |  |  | $ | (72.2 | ) |  | $ | (2.6 | )
Net loss | — |  |  | — |  |  | — |  |  | (190.4 | ) |  | — |  |  | — |  |  | 2.4 |
Dividends paid ($0.04 per share) | — |  |  | — |  |  | — |  |  | (4.5 | ) |  | — |  |  | — |  |  | — |
Shares issued under share-based compensation plans, net | — |  |  | — |  |  | (.1 | ) |  | — |  |  | — |  |  | .1 |  |  | — |
Repurchase of shares | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (2.8 | ) |  | — |
Share-based compensation cost | — |  |  | — |  |  | 5.3 |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive income | — |  |  | — |  |  | — |  |  | — |  |  | 1.5 |  |  | — |  |  | — |
BALANCE, March 31, 2019 | 115.2 |  |  | $ | 46.2 |  |  | $ | 7,230.2 |  |  | $ | 679.3 |  |  | $ | 19.7 |  |  | $ | (74.9 | ) |  | $ | (0.2 | )
Net income | — |  |  | — |  |  | — |  |  | 405.5 |  |  | — |  |  | — |  |  | 1.8 |
Equity issuance in connection with the Rowan Transaction | 88.0 |  |  | 35.2 |  |  | 1,365.5 |  |  | — |  |  | — |  |  | 2.1 |  |  | — |
Shares issued under share-based compensation plans, net | 2.6 |  |  | 1.1 |  |  | (1.1 | ) |  | — |  |  | — |  |  | (.8 | ) |  | — |
Repurchase of shares | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1.4 | ) |  | — |
Share-based compensation cost | — |  |  | — |  |  | 13.8 |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive income | — |  |  | — |  |  | — |  |  | — |  |  | .2 |  |  | — |  |  | — |
BALANCE, June 30, 2019 | 205.8 |  |  | $ | 82.5 |  |  | $ | 8,608.4 |  |  | $ | 1,084.8 |  |  | $ | 19.9 |  |  | $ | (75.0 | ) |  | $ | 1.6 |
| Shares |  | Par Value |  | Additional Paid-in Capital |  | Retained Earnings |  | AOCI |  | Treasury Shares |  | Non-controlling Interest
BALANCE, December 31, 2017 | 111.8 |  |  | $ | 44.8 |  |  | $ | 7,195.0 |  |  | $ | 1,532.7 |  |  | $ | 28.6 |  |  | $ | (69.0 | ) |  | $ | (2.1 | )
Net loss | — |  |  | — |  |  | — |  |  | (140.1 | ) |  | — |  |  | — |  |  | (.4 | )
Dividends paid ($0.04 per share) | — |  |  | — |  |  | — |  |  | (4.4 | ) |  | — |  |  | — |  |  | — |
Cumulative-effect due to ASU 2018-02 | — |  |  | — |  |  | — |  |  | (.8 | ) |  | .8 |  |  | — |  |  | — |
Shares issued under share-based compensation plans, net | — |  |  | — |  |  | (.1 | ) |  | — |  |  | — |  |  | .1 |  |  | — |
Repurchase of shares | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1.1 | ) |  | — |
Share-based compensation cost | — |  |  | — |  |  | 7.5 |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (.4 | ) |  | — |  |  | — |
BALANCE, March 31, 2018 | 111.8 |  |  | $ | 44.8 |  |  | $ | 7,202.4 |  |  | $ | 1,387.4 |  |  | $ | 29.0 |  |  | $ | (70.0 | ) |  | $ | (2.5 | )
Net loss | — |  |  | — |  |  | — |  |  | (151.0 | ) |  | — |  |  | — |  |  | .9 |
Dividends paid ($0.04 per share) | — |  |  | — |  |  | — |  |  | (4.4 | ) |  | — |  |  | — |  |  | — |
Shares issued under share-based compensation plans, net | 3.4 |  |  | 1.4 |  |  | (.4 | ) |  | — |  |  | — |  |  | (1.4 | ) |  | — |
Distributions to noncontrolling interests | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (.7 | )
Repurchase of shares | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (.6 | ) |  | — |
Share-based compensation cost | — |  |  | — |  |  | 7.5 |  |  | — |  |  | — |  |  | — |  |  | — |
Net other comprehensive loss | — |  |  | — |  |  | — |  |  | — |  |  | (8.5 | ) |  | — |  |  | — |
BALANCE, June 30, 2018 | 115.2 |  |  | $ | 46.2 |  |  | $ | 7,209.5 |  |  | $ | 1,232.0 |  |  | $ | 20.5 |  |  | $ | (72.0 | ) |  | $ | (2.3 | )
In connection with the Rowan Transaction on April 11, 2019, we issued 88.3 million Class A ordinary shares with an aggregate value of $1.4 billion. See Note 3 for additional information. On April 11, 2019, we completed our combination with Rowan and effected a four-to-one share consolidation (being a reverse stock split under English law or the "Reverse Stock Split"). All share and per-share amounts in these financial statements have been retrospectively adjusted to reflect the Reverse Stock Split.

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- Definition The entire disclosure for accounts comprising shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income, and compensation-related costs for equity-based compensation. Includes, but is not limited to, disclosure of policies, compensation plan details, equity-based arrangements to obtain goods and services, deferred compensation arrangements, and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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- Definition Shareholders' Equity [Abstract] + References No definition available. + Details
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